The Relevé 2 slip shows retirement and annuity income. This includes life annuity payments (from a registered or unregistered plan), benefits from RRSPs, RRIFs, and DPSPs, refunds of undeducted RRSP contributions, HBP and LLP withdrawals, and income earned after death.
TurboTax autmatically transfers most of the amounts from your T4A and T4RSP slip to your Relevé 2 slip for you. Verify the amounts transferred and manully enter the amounts from your source slip that weren't transferred.